I know it's not horror, but the original Star Wars trilogy looks WAY better then episodes 1-3. The aliens in the Cantina still look better then the aliens in the newer episodes.

Oh, and for CGI, the Dinosaurs of jurassic park always look good.

If you've ever seen a dead body or two, you know old school FX aren't that cheesey

Freddy Vs Jason CGI blood was some of the worst that comes to immediate memory.

Tom Savini studied horror films in Vietnam. He knows what's best.

I didn't bother to read every reply, but in my opinion: CGI blood sucks. I can always tell it's fake and it always pulls me out of the illusion of the movie. That's why "I Am Legend" with Will Smith disappointed me so greatly. The vampire creatures were all CGI, a terrible choice, and made the movie just seem fake to me.